Analysis

  • max time kernel
    146s
  • max time network
    140s
  • platform
    windows7_x64
  • resource
    win7-20230712-en
  • resource tags

    arch:x64arch:x86image:win7-20230712-enlocale:en-usos:windows7-x64system
  • submitted
    26/07/2023, 01:01

General

  • Target
    5899c6cc2b11f9a7ea953496e5808cd87f8bf85bbed2cb419e50524e9c76cf30.exe
  • Size 175KB
  • Sample230726-bc9zcsgf39
  • SHA256 5899c6cc2b11f9a7ea953496e5808cd87f8bf85bbed2cb419e50524e9c76cf30
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • asyncrat

Botnet
  • Default

C2
  • 127.0.0.1:6606

  • 127.0.0.1:7707

  • 127.0.0.1:8808

  • https://api.telegram.org/bot6505315332:AAE223agsSlTsgqmv1AU3cbQlHn8mQagTZw/sendMessage?chat_id=6217984158

Mutex
  • AsyncMutex_6SI8OkPnk

Attributes
  • delay

    3

  • install

    false

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers written in C#.

  • StormKitty

    StormKitty is an open source info stealer written in C#.

  • StormKitty payload 1 IoCs
  • Async RAT payload 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Drops desktop.ini file(s) 8 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Looks up geolocation information via web service

    Uses a legitimate geolocation service to find the infected system's geolocation info.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\5899c6cc2b11f9a7ea953496e5808cd87f8bf85bbed2cb419e50524e9c76cf30.exe
    "C:\Users\Admin\AppData\Local\Temp\5899c6cc2b11f9a7ea953496e5808cd87f8bf85bbed2cb419e50524e9c76cf30.exe"
    1⤵
    • Drops desktop.ini file(s)
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2236
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2012
      • C:\Windows\SysWOW64\chcp.com
        chcp 65001
        3⤵
          PID:2468
        • C:\Windows\SysWOW64\netsh.exe
          netsh wlan show profile
          3⤵
            PID:2480
          • C:\Windows\SysWOW64\findstr.exe
            findstr All
            3⤵
              PID:2456
          • C:\Windows\SysWOW64\cmd.exe
            "cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1916
            • C:\Windows\SysWOW64\chcp.com
              chcp 65001
              3⤵
                PID:2780
              • C:\Windows\SysWOW64\netsh.exe
                netsh wlan show networks mode=bssid
                3⤵
                  PID:2800

            Network

                  MITRE ATT&CK Enterprise v15

                  Replay Monitor

                  Loading Replay Monitor...

                  Downloads

                  94308059B57B3142E455B38A6EB92015

                  • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
                  • Size 344B
                  • SHA256 e27c4de6710480ee54bcbf33754e07d8226d9b8cdcc53e0a02620c8b3c7cfe70
                  • MD5 SHA1 SHA512

                  msgid.dat

                  • Path C:\Users\Admin\AppData\Local\99d883b23b0d0c5b2b3dfb70357e41c4\msgid.dat
                  • Size 1B
                  • SHA256 5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9
                  • MD5 SHA1 SHA512

                  CabCECD.tmp

                  • Path C:\Users\Admin\AppData\Local\Temp\CabCECD.tmp
                  • Size 62KB
                  • SHA256 d015145d551ecd14916270efad773bbc9fd57fad2228d2c24559f696c961d904
                  • MD5 SHA1 SHA512 SSDEEP

                  TarD017.tmp

                  • Path C:\Users\Admin\AppData\Local\Temp\TarD017.tmp
                  • Size 164KB
                  • SHA256 c8733c93cc5aaf5ca206d06af22ee8dbdec764fb5085019a6a9181feb9dfdee6
                  • MD5 SHA1 SHA512 SSDEEP

                  memory/2236-54-0x0000000001070000-0x00000000010A2000-memory.dmp

                  memory/2236-55-0x0000000074AF0000-0x00000000751DE000-memory.dmp

                  memory/2236-56-0x0000000000E30000-0x0000000000E70000-memory.dmp

                  memory/2236-123-0x0000000074AF0000-0x00000000751DE000-memory.dmp

                  memory/2236-124-0x0000000000E30000-0x0000000000E70000-memory.dmp

                  memory/2236-126-0x0000000000E30000-0x0000000000E70000-memory.dmp

                  memory/2236-205-0x0000000000E30000-0x0000000000E70000-memory.dmp